Issued Patents All Time
Showing 1–2 of 2 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 5243243 | Electric motor insulation resistance fault monitor | — | 1993-09-07 |
| 4583086 | Circuit for monitoring the operating condition of an electric load | John Herbert Frey | 1986-04-15 |